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Welcome to Bobby 3.1.1

About BobbyAdvanced OptionsDownload BobbyIcon GuidelinesBobby Approved[Navigation Image]

Bobby is a web-based tool that analyzes web pages for their accessibility to people with disabilities. CAST offers Bobby as a free public service in order to further its mission to expand opportunities for people with disabilities through the innovative uses of computer technology.

To analyze your web site, type in the URL of the page that you want Bobby to examine and click Submit. Bobby will display a report indicating any accessibility and/or browser compatibility errors found on the page. Once your site receives a Bobby Approved rating, you are entitled to display a Bobby Approved icon on your site.

Terms of Use

Bobby's analysis of accessibility is based on the World Wide Web Consortium's (W3C) Web Content Accessibility Guidelines. For example, to become Bobby approved, a Web site must:

  • provide text equivalents for all non-text elements (i.e., images, animations, audio, video)
  • provide summaries of graphs and charts
  • ensure that all information conveyed with color is also available without color
  • clearly identify changes in the natural language of a document's text and any text equivalents (e.g., captions) of non-text content
  • organize content logically and clearly
  • provide alternative content for features (e.g., applets or plug-ins) that may not be supported

Bobby also analyzes web pages for compatibility with various browsers. Analysis is based on documentation from browser vendors when available. Bobby automatically checks sites for compatibility with HTML 4.0. For accessibility and tag compatibility with browser specifications other than HTML 4.0, use the Advanced Options. Once your web site receives a Bobby Approved rating, you are entitled to use a Bobby Approved icon on your site.

Bobby is only one step in the process of making a site accessible to as many people as possible. CAST recommends that web developers use Bobby as a first step to ensure accessible web page design. Please be aware that there are some important aspects of accessible web page design that can not yet be tested by Bobby. Please review the How-to section and the Bobby FAQ for more information.

When your site is Bobby approved, please consider listing it in the Bobby Approved Database. It may draw positive attention to your Web site and help others to understand that Web accessibility is an important initiative.

About CAST

Bobby was created by the Center for Applied Special Technology (CAST). Founded in 1984, CAST is a not-for-profit organization whose mission is to expand opportunities for people with disabilities through innovative uses of computer technology.

CAST's major initiatives include product development and applied research. Product development focuses on the creation of universally designed curriculum and software including network learning systems for elementary schools and colleges, and supported learning tools and curriculum in the areas of literacy, mathematics, science, and social studies. Research is conducted in classrooms, homes, community organizations, and the Internet.